Bicycle



FIG. 1 is a side elevational view of a bicycle in accordance with our new design;

FIG. 2 is a rear side perspective view of the bicycle illustrated in FIG. 1 with the rear rack in a folded position; and,

FIG. 3 is a rear side perspective view of the bicycle illustrated in FIGS. 1 and 2 with a rear rack in an unfolded position.

The portions of the bicycle that cannot be seen in FIGS. 1-3 do not form a part of the claimed design. 

The ornamental design for a bicycle, as shown and described. 